Creating a CLI TypeScript library capable of generating complete files similar to NestJS: A step-by-step guide

Lately, I've been diving into Nestjs and experimenting with creating my own custom libraries for the tasks I frequently work on. Despite my efforts, I'm still struggling to develop a library that functions seamlessly on the CLI and enables me to generate new files similar to how "nest g resource ...." works. I have scoured the GitHub repository for answers, but unfortunately, I haven't found a solution yet. :(

Answer №1

When you utilize the generate feature within the CLI, you have the ability to create a new Nest element. This functionality is powered by Angular Schematics. By generating a command, controller, service, and more, you are essentially scaffolding it using an Angular Schematic. These schematics are contained in a distinct package known as a collection. The set of schematics provided by NestJS can be found in the @nestjs/schematics package.

The nest generate or nest g command serves as an alias for running an Angular Schematic. By default, NestJS relies on its own set of schematics. If you wish to develop your own, you must establish your own package (collection). Subsequently, you can reference this collection from the Nest CLI.

nest generate my-schematic --collection @my/collection

Alternatively, you have the option to directly use your custom schematics within the Angular CLI.

ng generate my-schematic:collection:my-schematic-name

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